#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<unistd.h>

int gval = 100;

int main()
{

printf("我是一个进程,pid:%d, ppid:%d\n",getpid(),getppid());
pid_t id = fork();

if(id == 0)
{
  while(1)
  {
    printf("我是子进程,pid:%d,ppid:%d,gval:%d,&gval:%p\n",getpid(),getppid(),gval,&gval);
    gval++;
    sleep(1);
  }
  
}
else
{
  while(1)
  {
    printf("我是父进程,pid:%d,ppid:%d,gval:%d,&gval:%p\n",getpid(),getppid(),gval,&gval);
    sleep(1);
  }

}


  return 0;
}

